Quote Originally Posted by happymedicine
Yes. Plants will esentially stop growing at 90 degrees and above.
Your information is inaccurate by almost 20 degrees.

At about 108 (9% ambient humidity) the plants start to fade, so at 104 or 105 I shut off the lights.

I've been doing it for years, but there are a few tricks and techniques to make the situation tenable. Check my signature for the 'Dealing with heat issues' thread. I just checked about 10 minutes ago...it's a comfortable 95 degrees in my flowering shed with my 1000w HPS running. (97 outside)

But yes, it is easier on the ladies to maintain a reasonable temperature using 'normal' grow techniques and guidelines.